A decade after Saudi Arabia and the United Arab Emirates led a joint military campaign to curb Iran’s influence in Yemen, the two allies now find themselves pitted against each other there.

Scores of foreign nationals who traveled to a remote Indian Ocean island seeking adventure have become stranded there as simmering tensions between warring Yemeni parties and their backers disrupt ...

What is unfolding now is not merely a tactical disagreement over Yemen, but an expression of deeper strategic, economic, and ...